Remove newlines from help message

[Fryguy]

Newlines can cause trouble with translations as well as presentation in the UI. This particular string doesn't actually need the newlines, so this commit changes it to just not have them.

Alternative to ManageIQ/manageiq#23213

@agrare Please review. cc @jrafanie

[Fryguy]

@agrare Total aside, but the entirety of the Options class uses N_, which I don't think actually does the translation. N_ is meant for constants where you want to delay the translation until later, but something needs to call _ on it. I think this particular set is meant to be queried over the API and thus translated, so I think these are all wrong, or am I missing some detail here?

[agrare]

@Fryguy any of the params_for_create/params_for_update methods are all OPTIONS calls over the API so I'm not sure if the locale is set in that context. I'm having trouble finding where those Options are used maybe it is old code that is no longer needed? Will need more investigation.